/* ============================================
   PDF Tools - File Manager Styles
   ============================================ */

.fm-container {
    display: flex;
    min-height: calc(100vh - 72px);
    margin-top: 72px;
}

/* Sidebar */
.fm-sidebar {
    width: 260px;
    padding: var(--space-4);
    background: var(--surface);
    border-right: 1px solid var(--border-subtle);
    flex-shrink: 0;
    overflow-y: auto;
}

.fm-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.fm-nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.fm-nav-item:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.fm-nav-item.active {
    background: var(--primary-glow);
    color: var(--primary);
}

.fm-nav-count {
    margin-left: auto;
    font-size: var(--text-xs);
    padding: 2px 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.fm-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: var(--space-4) 0;
}

.fm-section-title {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

/* Folders */
.fm-folders {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.fm-folder-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.fm-folder-item:hover {
    background: var(--bg-secondary);
}

.fm-folder-item.active {
    background: var(--primary-glow);
    color: var(--primary);
}

.fm-add-folder {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: none;
    background: none;
    color: var(--text-muted);
    font-size: var(--text-sm);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.fm-add-folder:hover {
    color: var(--primary);
}

/* Tags */
.fm-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.fm-tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    background: color-mix(in srgb, var(--tag-color, #6b7280) 20%, transparent);
    color: var(--tag-color, #6b7280);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.fm-tag:hover {
    background: color-mix(in srgb, var(--tag-color, #6b7280) 30%, transparent);
}

.fm-tag.active {
    background: var(--tag-color, #6b7280);
    color: white;
}

/* Storage */
.fm-storage {
    padding: var(--space-3);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.fm-storage-info {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--text-muted);
    margin-bottom: var(--space-2);
}

/* Main Content */
.fm-main {
    flex: 1;
    padding: var(--space-4);
    overflow-y: auto;
    background: var(--bg-primary);
}

/* Toolbar */
.fm-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.fm-search {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex: 1;
    max-width: 400px;
    padding: var(--space-2) var(--space-3);
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.fm-search input {
    flex: 1;
    border: none;
    background: none;
    color: var(--text-primary);
    outline: none;
}

.fm-search svg {
    color: var(--text-muted);
}

.fm-toolbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.fm-sort {
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--surface);
    color: var(--text-primary);
    font-size: var(--text-sm);
    cursor: pointer;
}

.fm-view-toggle {
    display: flex;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.fm-view-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.fm-view-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.fm-view-btn.active {
    background: var(--primary);
    color: white;
}

/* Breadcrumb */
.fm-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    font-size: var(--text-sm);
}

.fm-breadcrumb-item {
    color: var(--text-muted);
    cursor: pointer;
}

.fm-breadcrumb-item:hover {
    color: var(--text-primary);
}

.fm-breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

.fm-breadcrumb-item:not(:last-child)::after {
    content: '/';
    margin-left: var(--space-2);
    color: var(--text-muted);
}

/* Selection Bar */
.fm-selection-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-4);
    background: var(--primary);
    color: white;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.fm-selection-actions {
    display: flex;
    gap: var(--space-2);
}

.fm-selection-actions .btn {
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
}

.fm-selection-actions .btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Files Container */
.fm-files {
    min-height: 300px;
}

/* Empty State */
.fm-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    text-align: center;
    color: var(--text-muted);
}

.fm-empty svg {
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.fm-empty h3 {
    font-size: var(--text-lg);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

/* Grid View */
.fm-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-4);
}

.fm-file-card {
    background: var(--surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.fm-file-card:hover {
    border-color: var(--border-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.fm-file-card.selected {
    border-color: var(--primary);
    background: var(--primary-glow);
}

.fm-file-card .fm-checkbox {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.fm-file-card:hover .fm-checkbox,
.fm-file-card.selected .fm-checkbox {
    opacity: 1;
}

.fm-file-preview {
    width: 100%;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-3);
    overflow: hidden;
}

.fm-file-preview canvas {
    max-width: 100%;
    max-height: 100%;
}

.fm-file-preview svg {
    color: var(--text-muted);
}

.fm-file-name {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: var(--space-1);
}

.fm-file-meta {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.fm-file-star {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition-fast);
}

.fm-file-card:hover .fm-file-star {
    opacity: 1;
}

.fm-file-star.active {
    opacity: 1;
    color: #fbbf24;
}

/* List View */
.fm-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.fm-list .fm-file-card {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
}

.fm-list .fm-file-preview {
    width: 48px;
    height: 48px;
    margin-bottom: 0;
}

.fm-list .fm-file-info {
    flex: 1;
    min-width: 0;
}

.fm-list .fm-file-meta {
    width: 200px;
    gap: var(--space-4);
}

/* Compact View */
.fm-compact {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.fm-compact .fm-file-card {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: 0;
    border: none;
}

.fm-compact .fm-file-preview {
    display: none;
}

.fm-compact .fm-file-icon {
    width: 24px;
    height: 24px;
}

/* Details Panel */
.fm-details {
    width: 300px;
    padding: var(--space-4);
    background: var(--surface);
    border-left: 1px solid var(--border-subtle);
    flex-shrink: 0;
    overflow-y: auto;
}

.fm-details-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.fm-details-header h3 {
    font-size: var(--text-base);
    font-weight: 600;
}

.fm-close-btn {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    cursor: pointer;
}

.fm-preview {
    width: 100%;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    overflow: hidden;
}

.fm-preview canvas {
    max-width: 100%;
    max-height: 100%;
}

.fm-details-content h4 {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-3);
    word-break: break-all;
}

.fm-details-meta {
    margin-bottom: var(--space-4);
}

.fm-meta-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--border-subtle);
    font-size: var(--text-sm);
}

.fm-meta-row span:first-child {
    color: var(--text-muted);
}

.fm-details-tags h5 {
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.fm-tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
    margin-bottom: var(--space-2);
}

.fm-add-tag-btn {
    font-size: var(--text-xs);
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
}

.fm-add-tag-btn:hover {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 1024px) {
    .fm-details {
        display: none;
    }
}

@media (max-width: 768px) {
    .fm-container {
        flex-direction: column;
        margin-top: 56px;
        min-height: calc(100vh - 56px);
    }

    .fm-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-subtle);
        padding: var(--space-3);
    }

    .fm-nav {
        flex-direction: row;
        overflow-x: auto;
    }

    .fm-nav-item {
        white-space: nowrap;
    }

    .fm-divider,
    .fm-section-title,
    .fm-folders,
    .fm-add-folder,
    .fm-tags,
    .fm-storage {
        display: none;
    }

    .fm-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .fm-search {
        max-width: none;
    }

    .fm-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
}